COIN-OR::LEMON - Graph Library

source: lemon/lemon/graph_to_eps.h @ 206:4e22275a2b52

Last change on this file since 206:4e22275a2b52 was 206:4e22275a2b52, checked in by Peter Kovacs <kpeter@…>, 11 years ago

Improvements related to graphToEps()

File size: 36.6 KB
Line 
1/* -*- C++ -*-
2 *
3 * This file is a part of LEMON, a generic C++ optimization library
4 *
5 * Copyright (C) 2003-2008
6 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
7 * (Egervary Research Group on Combinatorial Optimization, EGRES).
8 *
9 * Permission to use, modify and distribute this software is granted
10 * provided that this copyright notice appears in all copies. For
11 * precise terms see the accompanying LICENSE file.
12 *
13 * This software is provided "AS IS" with no warranty of any kind,
14 * express or implied, and with no claim as to its suitability for any
15 * purpose.
16 *
17 */
18
19#ifndef LEMON_GRAPH_TO_EPS_H
20#define LEMON_GRAPH_TO_EPS_H
21
22#include<iostream>
23#include<fstream>
24#include<sstream>
25#include<algorithm>
26#include<vector>
27
28#ifndef WIN32
29#include<sys/time.h>
30#include<ctime>
31#else
32#define WIN32_LEAN_AND_MEAN
33#define NOMINMAX
34#include<windows.h>
35#endif
36
37#include<lemon/math.h>
38#include<lemon/bits/invalid.h>
39#include<lemon/dim2.h>
40#include<lemon/maps.h>
41#include<lemon/color.h>
42#include<lemon/bits/bezier.h>
43
44
45///\ingroup eps_io
46///\file
47///\brief A well configurable tool for visualizing graphs
48
49namespace lemon {
50
51  namespace _graph_to_eps_bits {
52    template<class MT>
53    class _NegY {
54    public:
55      typedef typename MT::Key Key;
56      typedef typename MT::Value Value;
57      const MT &map;
58      int yscale;
59      _NegY(const MT &m,bool b) : map(m), yscale(1-b*2) {}
60      Value operator[](Key n) { return Value(map[n].x,map[n].y*yscale);}
61    };
62  }
63 
64///Default traits class of \ref GraphToEps
65
66///Default traits class of \ref GraphToEps.
67///
68///\c G is the type of the underlying graph.
69template<class G>
70struct DefaultGraphToEpsTraits
71{
72  typedef G Graph;
73  typedef typename Graph::Node Node;
74  typedef typename Graph::NodeIt NodeIt;
75  typedef typename Graph::Arc Arc;
76  typedef typename Graph::ArcIt ArcIt;
77  typedef typename Graph::InArcIt InArcIt;
78  typedef typename Graph::OutArcIt OutArcIt;
79 
80
81  const Graph &g;
82
83  std::ostream& os;
84 
85  typedef ConstMap<typename Graph::Node,dim2::Point<double> > CoordsMapType;
86  CoordsMapType _coords;
87  ConstMap<typename Graph::Node,double > _nodeSizes;
88  ConstMap<typename Graph::Node,int > _nodeShapes;
89
90  ConstMap<typename Graph::Node,Color > _nodeColors;
91  ConstMap<typename Graph::Arc,Color > _arcColors;
92
93  ConstMap<typename Graph::Arc,double > _arcWidths;
94
95  double _arcWidthScale;
96 
97  double _nodeScale;
98  double _xBorder, _yBorder;
99  double _scale;
100  double _nodeBorderQuotient;
101 
102  bool _drawArrows;
103  double _arrowLength, _arrowWidth;
104 
105  bool _showNodes, _showArcs;
106
107  bool _enableParallel;
108  double _parArcDist;
109
110  bool _showNodeText;
111  ConstMap<typename Graph::Node,bool > _nodeTexts; 
112  double _nodeTextSize;
113
114  bool _showNodePsText;
115  ConstMap<typename Graph::Node,bool > _nodePsTexts; 
116  char *_nodePsTextsPreamble;
117 
118  bool _undirected;
119
120  bool _pleaseRemoveOsStream;
121
122  bool _scaleToA4;
123
124  std::string _title;
125  std::string _copyright;
126
127  enum NodeTextColorType
128    { DIST_COL=0, DIST_BW=1, CUST_COL=2, SAME_COL=3 } _nodeTextColorType;
129  ConstMap<typename Graph::Node,Color > _nodeTextColors;
130
131  bool _autoNodeScale;
132  bool _autoArcWidthScale;
133
134  bool _absoluteNodeSizes;
135  bool _absoluteArcWidths;
136
137  bool _negY;
138
139  bool _preScale;
140  ///Constructor
141
142  ///Constructor
143  ///\param _g  Reference to the graph to be printed.
144  ///\param _os Reference to the output stream.
145  ///\param _os Reference to the output stream. By default it is <tt>std::cout</tt>.
146  ///\param _pros If it is \c true, then the \c ostream referenced by \c _os
147  ///will be explicitly deallocated by the destructor.
148  DefaultGraphToEpsTraits(const G &_g,std::ostream& _os=std::cout,
149                          bool _pros=false) :
150    g(_g), os(_os),
151    _coords(dim2::Point<double>(1,1)), _nodeSizes(1), _nodeShapes(0),
152    _nodeColors(WHITE), _arcColors(BLACK),
153    _arcWidths(1.0), _arcWidthScale(0.003),
154    _nodeScale(.01), _xBorder(10), _yBorder(10), _scale(1.0),
155    _nodeBorderQuotient(.1),
156    _drawArrows(false), _arrowLength(1), _arrowWidth(0.3),
157    _showNodes(true), _showArcs(true),
158    _enableParallel(false), _parArcDist(1),
159    _showNodeText(false), _nodeTexts(false), _nodeTextSize(1),
160    _showNodePsText(false), _nodePsTexts(false), _nodePsTextsPreamble(0),
161    _undirected(lemon::UndirectedTagIndicator<G>::value),
162    _pleaseRemoveOsStream(_pros), _scaleToA4(false),
163    _nodeTextColorType(SAME_COL), _nodeTextColors(BLACK),
164    _autoNodeScale(false),
165    _autoArcWidthScale(false),
166    _absoluteNodeSizes(false),
167    _absoluteArcWidths(false),
168    _negY(false),
169    _preScale(true)
170  {}
171};
172
173///Auxiliary class to implement the named parameters of \ref graphToEps()
174
175///Auxiliary class to implement the named parameters of \ref graphToEps().
176///
177///For detailed examples see the \ref graph_to_eps_demo.cc demo file.
178template<class T> class GraphToEps : public T
179{
180  // Can't believe it is required by the C++ standard
181  using T::g;
182  using T::os;
183
184  using T::_coords;
185  using T::_nodeSizes;
186  using T::_nodeShapes;
187  using T::_nodeColors;
188  using T::_arcColors;
189  using T::_arcWidths;
190
191  using T::_arcWidthScale;
192  using T::_nodeScale;
193  using T::_xBorder;
194  using T::_yBorder;
195  using T::_scale;
196  using T::_nodeBorderQuotient;
197 
198  using T::_drawArrows;
199  using T::_arrowLength;
200  using T::_arrowWidth;
201 
202  using T::_showNodes;
203  using T::_showArcs;
204
205  using T::_enableParallel;
206  using T::_parArcDist;
207
208  using T::_showNodeText;
209  using T::_nodeTexts; 
210  using T::_nodeTextSize;
211
212  using T::_showNodePsText;
213  using T::_nodePsTexts; 
214  using T::_nodePsTextsPreamble;
215 
216  using T::_undirected;
217
218  using T::_pleaseRemoveOsStream;
219
220  using T::_scaleToA4;
221
222  using T::_title;
223  using T::_copyright;
224
225  using T::NodeTextColorType;
226  using T::CUST_COL;
227  using T::DIST_COL;
228  using T::DIST_BW;
229  using T::_nodeTextColorType;
230  using T::_nodeTextColors;
231
232  using T::_autoNodeScale;
233  using T::_autoArcWidthScale;
234
235  using T::_absoluteNodeSizes;
236  using T::_absoluteArcWidths;
237
238
239  using T::_negY;
240  using T::_preScale;
241
242  // dradnats ++C eht yb deriuqer si ti eveileb t'naC
243
244  typedef typename T::Graph Graph;
245  typedef typename Graph::Node Node;
246  typedef typename Graph::NodeIt NodeIt;
247  typedef typename Graph::Arc Arc;
248  typedef typename Graph::ArcIt ArcIt;
249  typedef typename Graph::InArcIt InArcIt;
250  typedef typename Graph::OutArcIt OutArcIt;
251
252  static const int INTERPOL_PREC;
253  static const double A4HEIGHT;
254  static const double A4WIDTH;
255  static const double A4BORDER;
256
257  bool dontPrint;
258
259public:
260  ///Node shapes
261
262  ///Node shapes.
263  ///
264  enum NodeShapes {
265    /// = 0
266    ///\image html nodeshape_0.png
267    ///\image latex nodeshape_0.eps "CIRCLE shape (0)" width=2cm
268    CIRCLE=0,
269    /// = 1
270    ///\image html nodeshape_1.png
271    ///\image latex nodeshape_1.eps "SQUARE shape (1)" width=2cm
272    ///
273    SQUARE=1,
274    /// = 2
275    ///\image html nodeshape_2.png
276    ///\image latex nodeshape_2.eps "DIAMOND shape (2)" width=2cm
277    ///
278    DIAMOND=2,
279    /// = 3
280    ///\image html nodeshape_3.png
281    ///\image latex nodeshape_2.eps "MALE shape (4)" width=2cm
282    ///
283    MALE=3,
284    /// = 4
285    ///\image html nodeshape_4.png
286    ///\image latex nodeshape_2.eps "FEMALE shape (4)" width=2cm
287    ///
288    FEMALE=4
289  };
290
291private:
292  class arcLess {
293    const Graph &g;
294  public:
295    arcLess(const Graph &_g) : g(_g) {}
296    bool operator()(Arc a,Arc b) const
297    {
298      Node ai=std::min(g.source(a),g.target(a));
299      Node aa=std::max(g.source(a),g.target(a));
300      Node bi=std::min(g.source(b),g.target(b));
301      Node ba=std::max(g.source(b),g.target(b));
302      return ai<bi ||
303        (ai==bi && (aa < ba ||
304                    (aa==ba && ai==g.source(a) && bi==g.target(b))));
305    }
306  };
307  bool isParallel(Arc e,Arc f) const
308  {
309    return (g.source(e)==g.source(f)&&
310            g.target(e)==g.target(f)) ||
311      (g.source(e)==g.target(f)&&
312       g.target(e)==g.source(f));
313  }
314  template<class TT>
315  static std::string psOut(const dim2::Point<TT> &p)
316    {
317      std::ostringstream os;   
318      os << p.x << ' ' << p.y;
319      return os.str();
320    }
321  static std::string psOut(const Color &c)
322    {
323      std::ostringstream os;   
324      os << c.red() << ' ' << c.green() << ' ' << c.blue();
325      return os.str();
326    }
327 
328public:
329  GraphToEps(const T &t) : T(t), dontPrint(false) {};
330 
331  template<class X> struct CoordsTraits : public T {
332  typedef X CoordsMapType;
333    const X &_coords;
334    CoordsTraits(const T &t,const X &x) : T(t), _coords(x) {}
335  };
336  ///Sets the map of the node coordinates
337
338  ///Sets the map of the node coordinates.
339  ///\param x must be a node map with \ref dim2::Point "dim2::Point<double>" or
340  ///\ref dim2::Point "dim2::Point<int>" values.
341  template<class X> GraphToEps<CoordsTraits<X> > coords(const X &x) {
342    dontPrint=true;
343    return GraphToEps<CoordsTraits<X> >(CoordsTraits<X>(*this,x));
344  }
345  template<class X> struct NodeSizesTraits : public T {
346    const X &_nodeSizes;
347    NodeSizesTraits(const T &t,const X &x) : T(t), _nodeSizes(x) {}
348  };
349  ///Sets the map of the node sizes
350
351  ///Sets the map of the node sizes.
352  ///\param x must be a node map with \c double (or convertible) values.
353  template<class X> GraphToEps<NodeSizesTraits<X> > nodeSizes(const X &x)
354  {
355    dontPrint=true;
356    return GraphToEps<NodeSizesTraits<X> >(NodeSizesTraits<X>(*this,x));
357  }
358  template<class X> struct NodeShapesTraits : public T {
359    const X &_nodeShapes;
360    NodeShapesTraits(const T &t,const X &x) : T(t), _nodeShapes(x) {}
361  };
362  ///Sets the map of the node shapes
363
364  ///Sets the map of the node shapes.
365  ///The available shape values
366  ///can be found in \ref NodeShapes "enum NodeShapes".
367  ///\param x must be a node map with \c int (or convertible) values.
368  ///\sa NodeShapes
369  template<class X> GraphToEps<NodeShapesTraits<X> > nodeShapes(const X &x)
370  {
371    dontPrint=true;
372    return GraphToEps<NodeShapesTraits<X> >(NodeShapesTraits<X>(*this,x));
373  }
374  template<class X> struct NodeTextsTraits : public T {
375    const X &_nodeTexts;
376    NodeTextsTraits(const T &t,const X &x) : T(t), _nodeTexts(x) {}
377  };
378  ///Sets the text printed on the nodes
379
380  ///Sets the text printed on the nodes.
381  ///\param x must be a node map with type that can be pushed to a standard
382  ///\c ostream.
383  template<class X> GraphToEps<NodeTextsTraits<X> > nodeTexts(const X &x)
384  {
385    dontPrint=true;
386    _showNodeText=true;
387    return GraphToEps<NodeTextsTraits<X> >(NodeTextsTraits<X>(*this,x));
388  }
389  template<class X> struct NodePsTextsTraits : public T {
390    const X &_nodePsTexts;
391    NodePsTextsTraits(const T &t,const X &x) : T(t), _nodePsTexts(x) {}
392  };
393  ///Inserts a PostScript block to the nodes
394
395  ///With this command it is possible to insert a verbatim PostScript
396  ///block to the nodes.
397  ///The PS current point will be moved to the center of the node before
398  ///the PostScript block inserted.
399  ///
400  ///Before and after the block a newline character is inserted so you
401  ///don't have to bother with the separators.
402  ///
403  ///\param x must be a node map with type that can be pushed to a standard
404  ///\c ostream.
405  ///
406  ///\sa nodePsTextsPreamble()
407  template<class X> GraphToEps<NodePsTextsTraits<X> > nodePsTexts(const X &x)
408  {
409    dontPrint=true;
410    _showNodePsText=true;
411    return GraphToEps<NodePsTextsTraits<X> >(NodePsTextsTraits<X>(*this,x));
412  }
413  template<class X> struct ArcWidthsTraits : public T {
414    const X &_arcWidths;
415    ArcWidthsTraits(const T &t,const X &x) : T(t), _arcWidths(x) {}
416  };
417  ///Sets the map of the arc widths
418
419  ///Sets the map of the arc widths.
420  ///\param x must be an arc map with \c double (or convertible) values.
421  template<class X> GraphToEps<ArcWidthsTraits<X> > arcWidths(const X &x)
422  {
423    dontPrint=true;
424    return GraphToEps<ArcWidthsTraits<X> >(ArcWidthsTraits<X>(*this,x));
425  }
426
427  template<class X> struct NodeColorsTraits : public T {
428    const X &_nodeColors;
429    NodeColorsTraits(const T &t,const X &x) : T(t), _nodeColors(x) {}
430  };
431  ///Sets the map of the node colors
432
433  ///Sets the map of the node colors.
434  ///\param x must be a node map with \ref Color values.
435  ///
436  ///\sa Palette
437  template<class X> GraphToEps<NodeColorsTraits<X> >
438  nodeColors(const X &x)
439  {
440    dontPrint=true;
441    return GraphToEps<NodeColorsTraits<X> >(NodeColorsTraits<X>(*this,x));
442  }
443  template<class X> struct NodeTextColorsTraits : public T {
444    const X &_nodeTextColors;
445    NodeTextColorsTraits(const T &t,const X &x) : T(t), _nodeTextColors(x) {}
446  };
447  ///Sets the map of the node text colors
448
449  ///Sets the map of the node text colors.
450  ///\param x must be a node map with \ref Color values.
451  ///
452  ///\sa Palette
453  template<class X> GraphToEps<NodeTextColorsTraits<X> >
454  nodeTextColors(const X &x)
455  {
456    dontPrint=true;
457    _nodeTextColorType=CUST_COL;
458    return GraphToEps<NodeTextColorsTraits<X> >
459      (NodeTextColorsTraits<X>(*this,x));
460  }
461  template<class X> struct ArcColorsTraits : public T {
462    const X &_arcColors;
463    ArcColorsTraits(const T &t,const X &x) : T(t), _arcColors(x) {}
464  };
465  ///Sets the map of the arc colors
466
467  ///Sets the map of the arc colors.
468  ///\param x must be an arc map with \ref Color values.
469  ///
470  ///\sa Palette
471  template<class X> GraphToEps<ArcColorsTraits<X> >
472  arcColors(const X &x)
473  {
474    dontPrint=true;
475    return GraphToEps<ArcColorsTraits<X> >(ArcColorsTraits<X>(*this,x));
476  }
477  ///Sets a global scale factor for node sizes
478
479  ///Sets a global scale factor for node sizes.
480  ///
481  /// If nodeSizes() is not given, this function simply sets the node
482  /// sizes to \c d.  If nodeSizes() is given, but
483  /// autoNodeScale() is not, then the node size given by
484  /// nodeSizes() will be multiplied by the value \c d.
485  /// If both nodeSizes() and autoNodeScale() are used, then the
486  /// node sizes will be scaled in such a way that the greatest size will be
487  /// equal to \c d.
488  /// \sa nodeSizes()
489  /// \sa autoNodeScale()
490  GraphToEps<T> &nodeScale(double d=.01) {_nodeScale=d;return *this;}
491  ///Turns on/off the automatic node size scaling.
492
493  ///Turns on/off the automatic node size scaling.
494  ///
495  ///\sa nodeScale()
496  ///
497  GraphToEps<T> &autoNodeScale(bool b=true) {
498    _autoNodeScale=b;return *this;
499  }
500
501  ///Turns on/off the absolutematic node size scaling.
502
503  ///Turns on/off the absolutematic node size scaling.
504  ///
505  ///\sa nodeScale()
506  ///
507  GraphToEps<T> &absoluteNodeSizes(bool b=true) {
508    _absoluteNodeSizes=b;return *this;
509  }
510
511  ///Negates the Y coordinates.
512  GraphToEps<T> &negateY(bool b=true) {
513    _negY=b;return *this;
514  }
515
516  ///Turn on/off pre-scaling
517
518  ///By default graphToEps() rescales the whole image in order to avoid
519  ///very big or very small bounding boxes.
520  ///
521  ///This (p)rescaling can be turned off with this function.
522  ///
523  GraphToEps<T> &preScale(bool b=true) {
524    _preScale=b;return *this;
525  }
526
527  ///Sets a global scale factor for arc widths
528
529  /// Sets a global scale factor for arc widths.
530  ///
531  /// If arcWidths() is not given, this function simply sets the arc
532  /// widths to \c d.  If arcWidths() is given, but
533  /// autoArcWidthScale() is not, then the arc withs given by
534  /// arcWidths() will be multiplied by the value \c d.
535  /// If both arcWidths() and autoArcWidthScale() are used, then the
536  /// arc withs will be scaled in such a way that the greatest width will be
537  /// equal to \c d.
538  GraphToEps<T> &arcWidthScale(double d=.003) {_arcWidthScale=d;return *this;}
539  ///Turns on/off the automatic arc width scaling.
540
541  ///Turns on/off the automatic arc width scaling.
542  ///
543  ///\sa arcWidthScale()
544  ///
545  GraphToEps<T> &autoArcWidthScale(bool b=true) {
546    _autoArcWidthScale=b;return *this;
547  }
548  ///Turns on/off the absolutematic arc width scaling.
549
550  ///Turns on/off the absolutematic arc width scaling.
551  ///
552  ///\sa arcWidthScale()
553  ///
554  GraphToEps<T> &absoluteArcWidths(bool b=true) {
555    _absoluteArcWidths=b;return *this;
556  }
557  ///Sets a global scale factor for the whole picture
558  GraphToEps<T> &scale(double d) {_scale=d;return *this;}
559  ///Sets the width of the border around the picture
560  GraphToEps<T> &border(double b=10) {_xBorder=_yBorder=b;return *this;}
561  ///Sets the width of the border around the picture
562  GraphToEps<T> &border(double x, double y) {
563    _xBorder=x;_yBorder=y;return *this;
564  }
565  ///Sets whether to draw arrows
566  GraphToEps<T> &drawArrows(bool b=true) {_drawArrows=b;return *this;}
567  ///Sets the length of the arrowheads
568  GraphToEps<T> &arrowLength(double d=1.0) {_arrowLength*=d;return *this;}
569  ///Sets the width of the arrowheads
570  GraphToEps<T> &arrowWidth(double d=.3) {_arrowWidth*=d;return *this;}
571 
572  ///Scales the drawing to fit to A4 page
573  GraphToEps<T> &scaleToA4() {_scaleToA4=true;return *this;}
574 
575  ///Enables parallel arcs
576  GraphToEps<T> &enableParallel(bool b=true) {_enableParallel=b;return *this;}
577 
578  ///Sets the distance between parallel arcs
579  GraphToEps<T> &parArcDist(double d) {_parArcDist*=d;return *this;}
580 
581  ///Hides the arcs
582  GraphToEps<T> &hideArcs(bool b=true) {_showArcs=!b;return *this;}
583  ///Hides the nodes
584  GraphToEps<T> &hideNodes(bool b=true) {_showNodes=!b;return *this;}
585 
586  ///Sets the size of the node texts
587  GraphToEps<T> &nodeTextSize(double d) {_nodeTextSize=d;return *this;}
588
589  ///Sets the color of the node texts to be different from the node color
590
591  ///Sets the color of the node texts to be as different from the node color
592  ///as it is possible.
593  GraphToEps<T> &distantColorNodeTexts()
594  {_nodeTextColorType=DIST_COL;return *this;}
595  ///Sets the color of the node texts to be black or white and always visible.
596
597  ///Sets the color of the node texts to be black or white according to
598  ///which is more different from the node color.
599  GraphToEps<T> &distantBWNodeTexts()
600  {_nodeTextColorType=DIST_BW;return *this;}
601
602  ///Gives a preamble block for node Postscript block.
603 
604  ///Gives a preamble block for node Postscript block.
605  ///
606  ///\sa nodePsTexts()
607  GraphToEps<T> & nodePsTextsPreamble(const char *str) {
608    _nodePsTextsPreamble=str ;return *this;
609  }
610  ///Sets whether the graph is undirected
611
612  ///Sets whether the graph is undirected.
613  ///
614  ///This setting is the default for undirected graphs.
615  ///
616  ///\sa directed()
617   GraphToEps<T> &undirected(bool b=true) {_undirected=b;return *this;}
618
619  ///Sets whether the graph is directed
620
621  ///Sets whether the graph is directed.
622  ///Use it to show the edges as a pair of directed ones.
623  ///
624  ///This setting is the default for digraphs.
625  ///
626  ///\sa undirected()
627  GraphToEps<T> &directed(bool b=true) {_undirected=!b;return *this;}
628 
629  ///Sets the title.
630
631  ///Sets the title of the generated image,
632  ///namely it inserts a <tt>%%Title:</tt> DSC field to the header of
633  ///the EPS file.
634  GraphToEps<T> &title(const std::string &t) {_title=t;return *this;}
635  ///Sets the copyright statement.
636
637  ///Sets the copyright statement of the generated image,
638  ///namely it inserts a <tt>%%Copyright:</tt> DSC field to the header of
639  ///the EPS file.
640  GraphToEps<T> &copyright(const std::string &t) {_copyright=t;return *this;}
641
642protected:
643  bool isInsideNode(dim2::Point<double> p, double r,int t)
644  {
645    switch(t) {
646    case CIRCLE:
647    case MALE:
648    case FEMALE:
649      return p.normSquare()<=r*r;
650    case SQUARE:
651      return p.x<=r&&p.x>=-r&&p.y<=r&&p.y>=-r;
652    case DIAMOND:
653      return p.x+p.y<=r && p.x-p.y<=r && -p.x+p.y<=r && -p.x-p.y<=r;
654    }
655    return false;
656  }
657
658public:
659  ~GraphToEps() { }
660 
661  ///Draws the graph.
662
663  ///Like other functions using
664  ///\ref named-templ-func-param "named template parameters",
665  ///this function calls the algorithm itself, i.e. in this case
666  ///it draws the graph.
667  void run() {
668    //\todo better 'epsilon' would be nice here.
669    const double EPSILON=1e-9;
670    if(dontPrint) return;
671   
672    _graph_to_eps_bits::_NegY<typename T::CoordsMapType>
673      mycoords(_coords,_negY);
674
675    os << "%!PS-Adobe-2.0 EPSF-2.0\n";
676    if(_title.size()>0) os << "%%Title: " << _title << '\n';
677     if(_copyright.size()>0) os << "%%Copyright: " << _copyright << '\n';
678    os << "%%Creator: LEMON, graphToEps()\n";
679
680    {   
681#ifndef WIN32
682      timeval tv;
683      gettimeofday(&tv, 0);
684
685      char cbuf[26];
686      ctime_r(&tv.tv_sec,cbuf);
687      os << "%%CreationDate: " << cbuf;
688#else
689      SYSTEMTIME time;
690      char buf1[11], buf2[9], buf3[5];
691     
692      GetSystemTime(&time);
693      if (GetDateFormat(LOCALE_USER_DEFAULT, 0, &time,
694                        "ddd MMM dd", buf1, 11) &&
695          GetTimeFormat(LOCALE_USER_DEFAULT, 0, &time,
696                        "HH':'mm':'ss", buf2, 9) &&
697          GetDateFormat(LOCALE_USER_DEFAULT, 0, &time,
698                                "yyyy", buf3, 5)) {
699        os << "%%CreationDate: " << buf1 << ' '
700           << buf2 << ' ' << buf3 << std::endl;
701      }   
702#endif
703    }
704
705    if (_autoArcWidthScale) {
706      double max_w=0;
707      for(ArcIt e(g);e!=INVALID;++e)
708        max_w=std::max(double(_arcWidths[e]),max_w);
709      //\todo better 'epsilon' would be nice here.
710      if(max_w>EPSILON) {
711        _arcWidthScale/=max_w;
712      }
713    }
714
715    if (_autoNodeScale) {
716      double max_s=0;
717      for(NodeIt n(g);n!=INVALID;++n)
718        max_s=std::max(double(_nodeSizes[n]),max_s);
719      //\todo better 'epsilon' would be nice here.
720      if(max_s>EPSILON) {
721        _nodeScale/=max_s;
722      }
723    }
724
725    double diag_len = 1;
726    if(!(_absoluteNodeSizes&&_absoluteArcWidths)) {
727      dim2::BoundingBox<double> bb;
728      for(NodeIt n(g);n!=INVALID;++n) bb.add(mycoords[n]);
729      if (bb.empty()) {
730        bb = dim2::BoundingBox<double>(dim2::Point<double>(0,0));
731      }
732      diag_len = std::sqrt((bb.bottomLeft()-bb.topRight()).normSquare());
733      if(diag_len<EPSILON) diag_len = 1;
734      if(!_absoluteNodeSizes) _nodeScale*=diag_len;
735      if(!_absoluteArcWidths) _arcWidthScale*=diag_len;
736    }
737   
738    dim2::BoundingBox<double> bb;
739    for(NodeIt n(g);n!=INVALID;++n) {
740      double ns=_nodeSizes[n]*_nodeScale;
741      dim2::Point<double> p(ns,ns);
742      switch(_nodeShapes[n]) {
743      case CIRCLE:
744      case SQUARE:
745      case DIAMOND:
746        bb.add(p+mycoords[n]);
747        bb.add(-p+mycoords[n]);
748        break;
749      case MALE:
750        bb.add(-p+mycoords[n]);
751        bb.add(dim2::Point<double>(1.5*ns,1.5*std::sqrt(3.0)*ns)+mycoords[n]);
752        break;
753      case FEMALE:
754        bb.add(p+mycoords[n]);
755        bb.add(dim2::Point<double>(-ns,-3.01*ns)+mycoords[n]);
756        break;
757      }
758    }
759    if (bb.empty()) {
760      bb = dim2::BoundingBox<double>(dim2::Point<double>(0,0));
761    }
762   
763    if(_scaleToA4)
764      os <<"%%BoundingBox: 0 0 596 842\n%%DocumentPaperSizes: a4\n";
765    else {
766      if(_preScale) {
767        //Rescale so that BoundingBox won't be neither to big nor too small.
768        while(bb.height()*_scale>1000||bb.width()*_scale>1000) _scale/=10;
769        while(bb.height()*_scale<100||bb.width()*_scale<100) _scale*=10;
770      }
771     
772      os << "%%BoundingBox: "
773         << int(floor(bb.left()   * _scale - _xBorder)) << ' '
774         << int(floor(bb.bottom() * _scale - _yBorder)) << ' '
775         << int(ceil(bb.right()  * _scale + _xBorder)) << ' '
776         << int(ceil(bb.top()    * _scale + _yBorder)) << '\n';
777    }
778   
779    os << "%%EndComments\n";
780   
781    //x1 y1 x2 y2 x3 y3 cr cg cb w
782    os << "/lb { setlinewidth setrgbcolor newpath moveto\n"
783       << "      4 2 roll 1 index 1 index curveto stroke } bind def\n";
784    os << "/l { setlinewidth setrgbcolor newpath moveto lineto stroke } bind def\n";
785    //x y r
786    os << "/c { newpath dup 3 index add 2 index moveto 0 360 arc closepath } bind def\n";
787    //x y r
788    os << "/sq { newpath 2 index 1 index add 2 index 2 index add moveto\n"
789       << "      2 index 1 index sub 2 index 2 index add lineto\n"
790       << "      2 index 1 index sub 2 index 2 index sub lineto\n"
791       << "      2 index 1 index add 2 index 2 index sub lineto\n"
792       << "      closepath pop pop pop} bind def\n";
793    //x y r
794    os << "/di { newpath 2 index 1 index add 2 index moveto\n"
795       << "      2 index             2 index 2 index add lineto\n"
796       << "      2 index 1 index sub 2 index             lineto\n"
797       << "      2 index             2 index 2 index sub lineto\n"
798       << "      closepath pop pop pop} bind def\n";
799    // x y r cr cg cb
800    os << "/nc { 0 0 0 setrgbcolor 5 index 5 index 5 index c fill\n"
801       << "     setrgbcolor " << 1+_nodeBorderQuotient << " div c fill\n"
802       << "   } bind def\n";
803    os << "/nsq { 0 0 0 setrgbcolor 5 index 5 index 5 index sq fill\n"
804       << "     setrgbcolor " << 1+_nodeBorderQuotient << " div sq fill\n"
805       << "   } bind def\n";
806    os << "/ndi { 0 0 0 setrgbcolor 5 index 5 index 5 index di fill\n"
807       << "     setrgbcolor " << 1+_nodeBorderQuotient << " div di fill\n"
808       << "   } bind def\n";
809    os << "/nfemale { 0 0 0 setrgbcolor 3 index "
810       << _nodeBorderQuotient/(1+_nodeBorderQuotient)
811       << " 1.5 mul mul setlinewidth\n"
812       << "  newpath 5 index 5 index moveto "
813       << "5 index 5 index 5 index 3.01 mul sub\n"
814       << "  lineto 5 index 4 index .7 mul sub 5 index 5 index 2.2 mul sub moveto\n"
815       << "  5 index 4 index .7 mul add 5 index 5 index 2.2 mul sub lineto stroke\n"
816       << "  5 index 5 index 5 index c fill\n"
817       << "  setrgbcolor " << 1+_nodeBorderQuotient << " div c fill\n"
818       << "  } bind def\n";
819    os << "/nmale {\n"
820       << "  0 0 0 setrgbcolor 3 index "
821       << _nodeBorderQuotient/(1+_nodeBorderQuotient)
822       <<" 1.5 mul mul setlinewidth\n"
823       << "  newpath 5 index 5 index moveto\n"
824       << "  5 index 4 index 1 mul 1.5 mul add\n"
825       << "  5 index 5 index 3 sqrt 1.5 mul mul add\n"
826       << "  1 index 1 index lineto\n"
827       << "  1 index 1 index 7 index sub moveto\n"
828       << "  1 index 1 index lineto\n"
829       << "  exch 5 index 3 sqrt .5 mul mul sub exch 5 index .5 mul sub lineto\n"
830       << "  stroke\n"
831       << "  5 index 5 index 5 index c fill\n"
832       << "  setrgbcolor " << 1+_nodeBorderQuotient << " div c fill\n"
833       << "  } bind def\n";
834   
835
836    os << "/arrl " << _arrowLength << " def\n";
837    os << "/arrw " << _arrowWidth << " def\n";
838    // l dx_norm dy_norm
839    os << "/lrl { 2 index mul exch 2 index mul exch rlineto pop} bind def\n";
840    //len w dx_norm dy_norm x1 y1 cr cg cb
841    os << "/arr { setrgbcolor /y1 exch def /x1 exch def /dy exch def /dx exch def\n"
842       << "       /w exch def /len exch def\n"
843      //         << "       0.1 setlinewidth x1 y1 moveto dx len mul dy len mul rlineto stroke"
844       << "       newpath x1 dy w 2 div mul add y1 dx w 2 div mul sub moveto\n"
845       << "       len w sub arrl sub dx dy lrl\n"
846       << "       arrw dy dx neg lrl\n"
847       << "       dx arrl w add mul dy w 2 div arrw add mul sub\n"
848       << "       dy arrl w add mul dx w 2 div arrw add mul add rlineto\n"
849       << "       dx arrl w add mul neg dy w 2 div arrw add mul sub\n"
850       << "       dy arrl w add mul neg dx w 2 div arrw add mul add rlineto\n"
851       << "       arrw dy dx neg lrl\n"
852       << "       len w sub arrl sub neg dx dy lrl\n"
853       << "       closepath fill } bind def\n";
854    os << "/cshow { 2 index 2 index moveto dup stringwidth pop\n"
855       << "         neg 2 div fosi .35 mul neg rmoveto show pop pop} def\n";
856
857    os << "\ngsave\n";
858    if(_scaleToA4)
859      if(bb.height()>bb.width()) {
860        double sc= std::min((A4HEIGHT-2*A4BORDER)/bb.height(),
861                  (A4WIDTH-2*A4BORDER)/bb.width());
862        os << ((A4WIDTH -2*A4BORDER)-sc*bb.width())/2 + A4BORDER << ' '
863           << ((A4HEIGHT-2*A4BORDER)-sc*bb.height())/2 + A4BORDER
864           << " translate\n"
865           << sc << " dup scale\n"
866           << -bb.left() << ' ' << -bb.bottom() << " translate\n";
867      }
868      else {
869        //\todo Verify centering
870        double sc= std::min((A4HEIGHT-2*A4BORDER)/bb.width(),
871                  (A4WIDTH-2*A4BORDER)/bb.height());
872        os << ((A4WIDTH -2*A4BORDER)-sc*bb.height())/2 + A4BORDER << ' '
873           << ((A4HEIGHT-2*A4BORDER)-sc*bb.width())/2 + A4BORDER
874           << " translate\n"
875           << sc << " dup scale\n90 rotate\n"
876           << -bb.left() << ' ' << -bb.top() << " translate\n";
877        }
878    else if(_scale!=1.0) os << _scale << " dup scale\n";
879   
880    if(_showArcs) {
881      os << "%Arcs:\ngsave\n";     
882      if(_enableParallel) {
883        std::vector<Arc> el;
884        for(ArcIt e(g);e!=INVALID;++e)
885          if((!_undirected||g.source(e)<g.target(e))&&_arcWidths[e]>0
886             &&g.source(e)!=g.target(e))
887            el.push_back(e);
888        std::sort(el.begin(),el.end(),arcLess(g));
889       
890        typename std::vector<Arc>::iterator j;
891        for(typename std::vector<Arc>::iterator i=el.begin();i!=el.end();i=j) {
892          for(j=i+1;j!=el.end()&&isParallel(*i,*j);++j) ;
893
894          double sw=0;
895          for(typename std::vector<Arc>::iterator e=i;e!=j;++e)
896            sw+=_arcWidths[*e]*_arcWidthScale+_parArcDist;
897          sw-=_parArcDist;
898          sw/=-2.0;
899          dim2::Point<double>
900            dvec(mycoords[g.target(*i)]-mycoords[g.source(*i)]);
901          double l=std::sqrt(dvec.normSquare());
902          //\todo better 'epsilon' would be nice here.
903          dim2::Point<double> d(dvec/std::max(l,EPSILON));
904          dim2::Point<double> m;
905//        m=dim2::Point<double>(mycoords[g.target(*i)]+mycoords[g.source(*i)])/2.0;
906
907//        m=dim2::Point<double>(mycoords[g.source(*i)])+
908//          dvec*(double(_nodeSizes[g.source(*i)])/
909//             (_nodeSizes[g.source(*i)]+_nodeSizes[g.target(*i)]));
910
911          m=dim2::Point<double>(mycoords[g.source(*i)])+
912            d*(l+_nodeSizes[g.source(*i)]-_nodeSizes[g.target(*i)])/2.0;
913
914          for(typename std::vector<Arc>::iterator e=i;e!=j;++e) {
915            sw+=_arcWidths[*e]*_arcWidthScale/2.0;
916            dim2::Point<double> mm=m+rot90(d)*sw/.75;
917            if(_drawArrows) {
918              int node_shape;
919              dim2::Point<double> s=mycoords[g.source(*e)];
920              dim2::Point<double> t=mycoords[g.target(*e)];
921              double rn=_nodeSizes[g.target(*e)]*_nodeScale;
922              node_shape=_nodeShapes[g.target(*e)];
923              dim2::Bezier3 bez(s,mm,mm,t);
924              double t1=0,t2=1;
925              for(int ii=0;ii<INTERPOL_PREC;++ii)
926                if(isInsideNode(bez((t1+t2)/2)-t,rn,node_shape)) t2=(t1+t2)/2;
927                else t1=(t1+t2)/2;
928              dim2::Point<double> apoint=bez((t1+t2)/2);
929              rn = _arrowLength+_arcWidths[*e]*_arcWidthScale;
930              rn*=rn;
931              t2=(t1+t2)/2;t1=0;
932              for(int ii=0;ii<INTERPOL_PREC;++ii)
933                if((bez((t1+t2)/2)-apoint).normSquare()>rn) t1=(t1+t2)/2;
934                else t2=(t1+t2)/2;
935              dim2::Point<double> linend=bez((t1+t2)/2);             
936              bez=bez.before((t1+t2)/2);
937//            rn=_nodeSizes[g.source(*e)]*_nodeScale;
938//            node_shape=_nodeShapes[g.source(*e)];
939//            t1=0;t2=1;
940//            for(int i=0;i<INTERPOL_PREC;++i)
941//              if(isInsideNode(bez((t1+t2)/2)-t,rn,node_shape)) t1=(t1+t2)/2;
942//              else t2=(t1+t2)/2;
943//            bez=bez.after((t1+t2)/2);
944              os << _arcWidths[*e]*_arcWidthScale << " setlinewidth "
945                 << _arcColors[*e].red() << ' '
946                 << _arcColors[*e].green() << ' '
947                 << _arcColors[*e].blue() << " setrgbcolor newpath\n"
948                 << bez.p1.x << ' ' <<  bez.p1.y << " moveto\n"
949                 << bez.p2.x << ' ' << bez.p2.y << ' '
950                 << bez.p3.x << ' ' << bez.p3.y << ' '
951                 << bez.p4.x << ' ' << bez.p4.y << " curveto stroke\n";
952              dim2::Point<double> dd(rot90(linend-apoint));
953              dd*=(.5*_arcWidths[*e]*_arcWidthScale+_arrowWidth)/
954                std::sqrt(dd.normSquare());
955              os << "newpath " << psOut(apoint) << " moveto "
956                 << psOut(linend+dd) << " lineto "
957                 << psOut(linend-dd) << " lineto closepath fill\n";
958            }
959            else {
960              os << mycoords[g.source(*e)].x << ' '
961                 << mycoords[g.source(*e)].y << ' '
962                 << mm.x << ' ' << mm.y << ' '
963                 << mycoords[g.target(*e)].x << ' '
964                 << mycoords[g.target(*e)].y << ' '
965                 << _arcColors[*e].red() << ' '
966                 << _arcColors[*e].green() << ' '
967                 << _arcColors[*e].blue() << ' '
968                 << _arcWidths[*e]*_arcWidthScale << " lb\n";
969            }
970            sw+=_arcWidths[*e]*_arcWidthScale/2.0+_parArcDist;
971          }
972        }
973      }
974      else for(ArcIt e(g);e!=INVALID;++e)
975        if((!_undirected||g.source(e)<g.target(e))&&_arcWidths[e]>0
976           &&g.source(e)!=g.target(e)) {
977          if(_drawArrows) {
978            dim2::Point<double> d(mycoords[g.target(e)]-mycoords[g.source(e)]);
979            double rn=_nodeSizes[g.target(e)]*_nodeScale;
980            int node_shape=_nodeShapes[g.target(e)];
981            double t1=0,t2=1;
982            for(int i=0;i<INTERPOL_PREC;++i)
983              if(isInsideNode((-(t1+t2)/2)*d,rn,node_shape)) t1=(t1+t2)/2;
984              else t2=(t1+t2)/2;
985            double l=std::sqrt(d.normSquare());
986            d/=l;
987           
988            os << l*(1-(t1+t2)/2) << ' '
989               << _arcWidths[e]*_arcWidthScale << ' '
990               << d.x << ' ' << d.y << ' '
991               << mycoords[g.source(e)].x << ' '
992               << mycoords[g.source(e)].y << ' '
993               << _arcColors[e].red() << ' '
994               << _arcColors[e].green() << ' '
995               << _arcColors[e].blue() << " arr\n";
996          }
997          else os << mycoords[g.source(e)].x << ' '
998                  << mycoords[g.source(e)].y << ' '
999                  << mycoords[g.target(e)].x << ' '
1000                  << mycoords[g.target(e)].y << ' '
1001                  << _arcColors[e].red() << ' '
1002                  << _arcColors[e].green() << ' '
1003                  << _arcColors[e].blue() << ' '
1004                  << _arcWidths[e]*_arcWidthScale << " l\n";
1005        }
1006      os << "grestore\n";
1007    }
1008    if(_showNodes) {
1009      os << "%Nodes:\ngsave\n";
1010      for(NodeIt n(g);n!=INVALID;++n) {
1011        os << mycoords[n].x << ' ' << mycoords[n].y << ' '
1012           << _nodeSizes[n]*_nodeScale << ' '
1013           << _nodeColors[n].red() << ' '
1014           << _nodeColors[n].green() << ' '
1015           << _nodeColors[n].blue() << ' ';
1016        switch(_nodeShapes[n]) {
1017        case CIRCLE:
1018          os<< "nc";break;
1019        case SQUARE:
1020          os<< "nsq";break;
1021        case DIAMOND:
1022          os<< "ndi";break;
1023        case MALE:
1024          os<< "nmale";break;
1025        case FEMALE:
1026          os<< "nfemale";break;
1027        }
1028        os<<'\n';
1029      }
1030      os << "grestore\n";
1031    }
1032    if(_showNodeText) {
1033      os << "%Node texts:\ngsave\n";
1034      os << "/fosi " << _nodeTextSize << " def\n";
1035      os << "(Helvetica) findfont fosi scalefont setfont\n";
1036      for(NodeIt n(g);n!=INVALID;++n) {
1037        switch(_nodeTextColorType) {
1038        case DIST_COL:
1039          os << psOut(distantColor(_nodeColors[n])) << " setrgbcolor\n";
1040          break;
1041        case DIST_BW:
1042          os << psOut(distantBW(_nodeColors[n])) << " setrgbcolor\n";
1043          break;
1044        case CUST_COL:
1045          os << psOut(distantColor(_nodeTextColors[n])) << " setrgbcolor\n";
1046          break;
1047        default:
1048          os << "0 0 0 setrgbcolor\n";
1049        }
1050        os << mycoords[n].x << ' ' << mycoords[n].y
1051           << " (" << _nodeTexts[n] << ") cshow\n";
1052      }
1053      os << "grestore\n";
1054    }
1055    if(_showNodePsText) {
1056      os << "%Node PS blocks:\ngsave\n";
1057      for(NodeIt n(g);n!=INVALID;++n)
1058        os << mycoords[n].x << ' ' << mycoords[n].y
1059           << " moveto\n" << _nodePsTexts[n] << "\n";
1060      os << "grestore\n";
1061    }
1062   
1063    os << "grestore\nshowpage\n";
1064
1065    //CleanUp:
1066    if(_pleaseRemoveOsStream) {delete &os;}
1067  }
1068
1069  ///\name Aliases
1070  ///These are just some aliases to other parameter setting functions.
1071
1072  ///@{
1073
1074  ///An alias for arcWidths()
1075  template<class X> GraphToEps<ArcWidthsTraits<X> > edgeWidths(const X &x)
1076  {
1077    return arcWidths(x);
1078  }
1079
1080  ///An alias for arcColors()
1081  template<class X> GraphToEps<ArcColorsTraits<X> >
1082  edgeColors(const X &x)
1083  {
1084    return arcColors(x);
1085  }
1086
1087  ///An alias for arcWidthScale()
1088  GraphToEps<T> &edgeWidthScale(double d) {return arcWidthScale(d);}
1089
1090  ///An alias for autoArcWidthScale()
1091  GraphToEps<T> &autoEdgeWidthScale(bool b=true)
1092  {
1093    return autoArcWidthScale(b);
1094  }
1095 
1096  ///An alias for absoluteArcWidths()
1097  GraphToEps<T> &absoluteEdgeWidths(bool b=true)
1098  {
1099    return absoluteArcWidths(b);
1100  }
1101 
1102  ///An alias for parArcDist()
1103  GraphToEps<T> &parEdgeDist(double d) {return parArcDist(d);}
1104 
1105  ///An alias for hideArcs()
1106  GraphToEps<T> &hideEdges(bool b=true) {return hideArcs(b);}
1107
1108  ///@}
1109};
1110
1111template<class T>
1112const int GraphToEps<T>::INTERPOL_PREC = 20;
1113template<class T>
1114const double GraphToEps<T>::A4HEIGHT = 841.8897637795276;
1115template<class T>
1116const double GraphToEps<T>::A4WIDTH  = 595.275590551181;
1117template<class T>
1118const double GraphToEps<T>::A4BORDER = 15;
1119
1120
1121///Generates an EPS file from a graph
1122
1123///\ingroup eps_io
1124///Generates an EPS file from a graph.
1125///\param g Reference to the graph to be printed.
1126///\param os Reference to the output stream.
1127///By default it is <tt>std::cout</tt>.
1128///
1129///This function also has a lot of
1130///\ref named-templ-func-param "named parameters",
1131///they are declared as the members of class \ref GraphToEps. The following
1132///example shows how to use these parameters.
1133///\code
1134/// graphToEps(g,os).scale(10).coords(coords)
1135///              .nodeScale(2).nodeSizes(sizes)
1136///              .arcWidthScale(.4).run();
1137///\endcode
1138///
1139///For more detailed examples see the \ref graph_to_eps_demo.cc demo file.
1140///
1141///\warning Don't forget to put the \ref GraphToEps::run() "run()"
1142///to the end of the parameter list.
1143///\sa GraphToEps
1144///\sa graphToEps(G &g, const char *file_name)
1145template<class G>
1146GraphToEps<DefaultGraphToEpsTraits<G> >
1147graphToEps(G &g, std::ostream& os=std::cout)
1148{
1149  return
1150    GraphToEps<DefaultGraphToEpsTraits<G> >(DefaultGraphToEpsTraits<G>(g,os));
1151}
1152 
1153///Generates an EPS file from a graph
1154
1155///\ingroup eps_io
1156///This function does the same as
1157///\ref graphToEps(G &g,std::ostream& os)
1158///but it writes its output into the file \c file_name
1159///instead of a stream.
1160///\sa graphToEps(G &g, std::ostream& os)
1161template<class G>
1162GraphToEps<DefaultGraphToEpsTraits<G> >
1163graphToEps(G &g,const char *file_name)
1164{
1165  return GraphToEps<DefaultGraphToEpsTraits<G> >
1166    (DefaultGraphToEpsTraits<G>(g,*new std::ofstream(file_name),true));
1167}
1168
1169///Generates an EPS file from a graph
1170
1171///\ingroup eps_io
1172///This function does the same as
1173///\ref graphToEps(G &g,std::ostream& os)
1174///but it writes its output into the file \c file_name
1175///instead of a stream.
1176///\sa graphToEps(G &g, std::ostream& os)
1177template<class G>
1178GraphToEps<DefaultGraphToEpsTraits<G> >
1179graphToEps(G &g,const std::string& file_name)
1180{
1181  return GraphToEps<DefaultGraphToEpsTraits<G> >
1182    (DefaultGraphToEpsTraits<G>(g,*new std::ofstream(file_name.c_str()),true));
1183}
1184
1185} //END OF NAMESPACE LEMON
1186
1187#endif // LEMON_GRAPH_TO_EPS_H
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